A new ortho functionalisation of flouro- and ethylbenzene involving a 2,5- disilylation with trimethylcholorsilane in the presence of lithium in THF is reported. After aromatisation, electrophilic substitution of the TMS group in position 2, desilylation in position 5, ortho acetyl-, benzoyl-, bromo- and iodo- fluorobenzenes and ethylbenzenes are obtained in good yields.
                                    据报道,在THF中存在
锂的情况下,
氟和乙苯的新邻位官能化涉及与三甲基胆
硅烷的2,5-二
甲苯基化。芳构化后,以良好的产率获得了位置2处TMS基团的亲电子取代,位置5处的甲
硅烷基化,邻位乙酰基,苯甲酰基,
溴和
碘代
氟苯和乙苯。